<!DOCTYPE html>
<!-- lang表示网页语言，en表示英文 -->
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>HTML标签</title>
</head>

<body>

   <div></div>

</body>

</html>